From patchwork Tue Aug 1 12:02:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matti Vaittinen X-Patchwork-Id: 13336618 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C86BEC0015E for ; Tue, 1 Aug 2023 12:03:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230472AbjHAMDx (ORCPT ); Tue, 1 Aug 2023 08:03:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51294 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232623AbjHAMDe (ORCPT ); Tue, 1 Aug 2023 08:03:34 -0400 Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51DA21BD3; Tue, 1 Aug 2023 05:02:53 -0700 (PDT) Received: by mail-lf1-x12e.google.com with SMTP id 2adb3069b0e04-4fe463420fbso828504e87.3; Tue, 01 Aug 2023 05:02:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1690891371; x=1691496171; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=T9RO8UlUTwn3hEH6HK6IaUASxewRiScP6UARVCA4DwU=; b=CbTbEjkuDxtAWmuAnL+js8Un7DPuDyWVGzTLIvCt+LmXDumdE5C361SA3H6RwvCDq5 9EZq9crd6VtY7h7ZN08wKKdeIo+2jQI4CplVbieLrZwXGJstsKWvoMhwm07IP6HMYH3Y 3ksD8VpUghrQlGDRFY5t8m3/3+WCGC1yzT5Gc1zFF9Z00Ixn5RjbQp2QI10KldX9Nthy vs12jUes6M9QTiGFlpIfSQsw1DAQe4yoxhvdQRzsPBBNZNccwiHXxixQUJV8DqQ6pMqd GawK7CF7/pAySWm8Ny8u6sUKy9tgvswndlcGhU66iYdSNUxWb3U4xTatoofjMwZ+OraE E1eg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690891371; x=1691496171; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=T9RO8UlUTwn3hEH6HK6IaUASxewRiScP6UARVCA4DwU=; b=Uy7AHi0LxymaXhRmlS2VFRMgRCb9XxlqKZEE28J9YBte7QcKnkDS36naP/GFHPk8nq Xsk33BMaJZU6gCZ7cvGpMVPZVT1HikELLv0TO5IiCUEC2m3KU3bNANA7KmrF+5xIYcap 6mAfSsjR4kzB3pw78YuxtdSP4dDxvI7XX9japHNDUtg+/SdCk8gCiGUexVXMG4K+VoDU jPZ1D4JK9MLRhaSVls7kMHVwNEKl5/8ynHuTgGxc6bu/XbeLXdgLUdW4N3inxT5NS8nl 9qK2ykawn0uMvd++UBgU4OqgFqW1bucn5G59C/1CVHkgQMlT92LLOR13DEjkayiSVsby T0mw== X-Gm-Message-State: ABy/qLZeIH+Mcz0mnkbIZwI204WUrz+RNJ+OXTdZzfrN0mc2sJoUjuwv C5D9LFqYUrhipIaOK1fmaOc= X-Google-Smtp-Source: APBJJlH8k9qQDQnZ1nYtZrLLCdpwDqVmgDOxZJZlv3w36+eJv3zO0GNAVNtA6sXmOPXeQ9WKGgsJkg== X-Received: by 2002:a05:6512:1141:b0:4fe:4f8:8e75 with SMTP id m1-20020a056512114100b004fe04f88e75mr2039371lfg.68.1690891371256; Tue, 01 Aug 2023 05:02:51 -0700 (PDT) Received: from fedora ([213.255.186.46]) by smtp.gmail.com with ESMTPSA id d12-20020a05651221cc00b004f4b42e2d7dsm2518784lft.230.2023.08.01.05.02.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Aug 2023 05:02:50 -0700 (PDT) Date: Tue, 1 Aug 2023 15:02:47 +0300 From: Matti Vaittinen To: Matti Vaittinen , Matti Vaittinen Cc: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v8 2/8] iio: cdc: ad7150: relax return value check for IRQ get Message-ID: <3ad1c6f195ead3dfa8711235e1dead139d27f700.1690890774.git.mazziesaccount@gmail.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org fwnode_irq_get[_byname]() were changed to not return 0 anymore. The special error case where device-tree based IRQ mapping fails can't no longer be reliably detected from this return value. This yields a functional change in the driver where the mapping failure is treated as an error. The mapping failure can occur for example when the device-tree IRQ information translation call-back(s) (xlate) fail, IRQ domain is not found, IRQ type conflicts, etc. In most cases this indicates an error in the device-tree and special handling is not really required. One more thing to note is that ACPI APIs do not return zero for any failures so this special handling did only apply on device-tree based systems. Drop the special handling for DT mapping failures as these can no longer be separated from other errors at driver side. Change all failures in IRQ getting to be handled by continuing without the events instead of aborting the probe upon certain errors. Signed-off-by: Matti Vaittinen Reviewed-by: Jonathan Cameron --- Revision history: v5 => v6: - Never abort the probe when IRQ getting fails but continue without events. Please note that I don't have the hardware to test this change. Furthermore, testing this type of device-tree error cases is not trivial, as the question we probably dive in is "what happens with the existing users who have errors in the device-tree". Answering to this question is not simple. The patch changing the fwnode_irq_get() got merged during 5.4: https://lore.kernel.org/all/fb7241d3-d1d1-1c37-919b-488d6d007484@gmail.com/ This is a clean-up as agreed. --- drivers/iio/cdc/ad7150.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/iio/cdc/ad7150.c b/drivers/iio/cdc/ad7150.c index d656d2f12755..4c03b9e834b8 100644 --- a/drivers/iio/cdc/ad7150.c +++ b/drivers/iio/cdc/ad7150.c @@ -541,6 +541,7 @@ static int ad7150_probe(struct i2c_client *client) const struct i2c_device_id *id = i2c_client_get_device_id(client); struct ad7150_chip_info *chip; struct iio_dev *indio_dev; + bool use_irq = true; int ret; indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); @@ -561,14 +562,13 @@ static int ad7150_probe(struct i2c_client *client) chip->interrupts[0] = fwnode_irq_get(dev_fwnode(&client->dev), 0); if (chip->interrupts[0] < 0) - return chip->interrupts[0]; - if (id->driver_data == AD7150) { + use_irq = false; + else if (id->driver_data == AD7150) { chip->interrupts[1] = fwnode_irq_get(dev_fwnode(&client->dev), 1); if (chip->interrupts[1] < 0) - return chip->interrupts[1]; + use_irq = false; } - if (chip->interrupts[0] && - (id->driver_data == AD7151 || chip->interrupts[1])) { + if (use_irq) { irq_set_status_flags(chip->interrupts[0], IRQ_NOAUTOEN); ret = devm_request_threaded_irq(&client->dev, chip->interrupts[0],